JP3406885B2 - Channel resource management method of base station using dynamic function in mobile communication system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel resource management method for a base station in a mobile communication system.
ar System; hereinafter referred to as "DCS") or Personal Communication System;
CDMA (Code Division Mu) such as "PCS"
In a base station of a mobile communication system adopting the ltipleAccess) method, an overhead channel (Over
If the head channel fails, the dynamic (Dy
(namic) function to change the traffic channel to an overhead channel in real time, efficiently manage the channel resource for such channel change, and change the terminal device with the minimum change of channel resource. The present invention relates to a channel resource management method of a base station using a dynamic function in a mobile communication system capable of normally maintaining the service state of.

[0002]

2. Description of the Related Art Generally, in a mobile communication system such as DCS or PCS, as shown in FIG.
0), the base station (20) for transmitting and receiving data wirelessly to and from the terminal device (10), and the control station (30) for transmitting and receiving data to and from the base station (20) and controlling the data. And a switching center (40), and various devices in the base station (20) operate to perform basic calling and handoff processing between the base station (20) and the terminal (10). The call service status of the terminal (10) was smoothly maintained.

That is, the base station (20) and the terminal (10) are
The communication service state of the terminal 10 is maintained by wirelessly communicating with each other using various channel resources.

The channel resources are a pilot channel (Pilot Channel), a synchronization channel (Sync Channel), and a paging channel (Paging cha).
nnel), access channel (Access Channel) and traffic channel (Traffic Channel). Among them, pilot channel, synchronization channel, paging channel and access channel are called overhead channels. It receives from the base station, initializes the terminal system, and maintains a call service state.

The pilot channel among the overhead channels is a reference channel for realizing a system from a terminal, recognizing a base station, and timing, and is a sector or a cell. In the distinguishable channels, the synchronization channel is a channel for synchronizing the initial time synchronization between the terminal and the base station, and the paging channel is the information of the base station from the terminal such as frequency, system shape information, and neighboring shape. A channel for receiving and processing information and access-related information, and a channel for performing communication between the base station and the terminal based on the base station information and the operation information of the terminal,
The access channel is a channel used for signal processing in the reverse direction.

In addition, the pilot channel and the synchronization channel serve to maintain a call service state of a terminal in one sector or cell area, but in this case, only one channel resource is allocated. Since the mobile communication system is set, the channel resource corresponding to each code is allocated so that the 64 channel resources are substantially divided.

That is, the pilot channel is assigned a channel resource corresponding to No. 0 and serves as a reference for distinguishing each sector or cell, and the synchronization channel is assigned the channel resource corresponding to No. 32 to a terminal and a base station. It plays the role of matching the initial synchronization between the two.

The paging channel is one of 64 channel resources related to one sector or cell.
Since the first to seventh channel resources are used, a maximum of seven channel resources can be used, but normally only one channel resource is used, and base station shape information and terminal call information are used. To service.

On the other hand, if a fault or an error occurs in any of the overhead channels and the channel operates abnormally, the terminal does not recognize the base station, but recognizes the base station. However, since it should be initialized again, the call service state of the terminal cannot be normally maintained.

Therefore, conventionally, after a specific traffic channel is set in advance as a Stenby overhead channel by using the Active / Stanby duplex system, normal operation of the active overhead channel is prevented. If not possible,
The active overhead channel is replaced as a Stenby overhead channel of the preset traffic channel.

That is, when a specific traffic channel is preset and set as a sustain-by-overhead channel, and the active overhead channel is periodically inspected to perform an abnormal operation, it is preset from the base station. The traffic service Stenby overhead channel was used as an active over channel to maintain the call service to the terminal.

[0012]

However, in such a conventional overhead channel duplexing system, the channel to be used as a traffic channel is used as a sustain-by-overhead channel. At the time of duplexing the Stenby channel, the active channel and the Stenby channel periodically inspect each other's channel in order to monitor the state of the other's channel, so that there is a disadvantage that the load becomes large.

And before the traffic channel is preset for the Stenby overhead channel,
Since the traffic channel is initialized for the time being, and the service is set by setting it as the overhead channel, the terminal of the corresponding base station cannot temporarily provide service, and all the channels assigned to the call are disconnected. was there.

Therefore, the present invention has been made in view of such conventional problems, and an object of the present invention is to provide a base station of a mobile communication system employing a CDMA system such as DCS or PCS. When a failure and an error occur in the overhead channel of the above, the dynamic function is used to change the traffic channel that is not currently used in real time to the overhead channel, and when the failed overhead channel is recovered normally, the overhead The channel can be changed to a traffic channel again, and the channel resource management for such channel change can be efficiently performed so that the channel resource can be changed to the minimum and the call service state of the terminal can be normally maintained. The dynamic function of the mobile communication system To provide a channel resource management method in the base station.

[0015]

In order to achieve such an object, in a channel resource management method of a base station using a dynamic function in a mobile communication system according to the present invention, a base station initialization of the mobile communication system is performed. After that, create a database for channel management for each frequency or sector, initialize each status information and data, and periodically check the status of the overhead channel to determine whether the overhead channel has a failure. If a failure occurs in the overhead channel as a result of the first step and the result of the determination in the first step, the database is managed after the failure occurrence of the overhead channel is detected in real time, and is not used for the call at the moment. The second step of setting up the traffic channel and the second step The third step of maintaining the call service of the terminal normally by changing the status of the corresponding traffic channel, changing only the state, and operating the dynamic overhead channel. There is.

In the channel resource management method of the base station using the dynamic function of the mobile communication system according to the present invention, a database for channel management for each frequency or sector after initialization of the base station of the mobile communication system. And initializing respective status information and data, and then periodically checking the status of the overhead channel to judge whether a failure has occurred in the overhead channel, and the judgment result of the first step. If there is no failure in the overhead channel, the second step of determining whether the previously failed overhead channel is normally restored and operating, and the result of the second step, If the overhead channel that had the Third detecting dynamic overhead channel being currently service management
And a fourth step in which the dynamic overhead channel detected in the third step is not initialized, only the state is changed to operate as a traffic channel, and the call service of the terminal is normally maintained. It is designed to be included.

In addition, in the channel resource management method of the base station using the dynamic function in the mobile communication system according to the present invention, a database for channel management for each frequency or sector after initialization of the base station of the mobile communication system. And initializing respective status information and data, and then periodically checking the status of the overhead channel to judge whether a failure has occurred in the overhead channel, and the judgment result of the first step. , If the overhead channel fails,
After detecting a failure of an overhead channel in real time, a second step of managing a database to set a traffic channel which is not currently used for a call and a corresponding traffic channel set in the second step are described. The third step of maintaining the normal call service of the terminal by changing only the state without initializing and operating the dynamic overhead channel, and the result of the judgment of the first step, a failure occurs in the overhead channel. If not, the fourth step is to judge whether the previously failed overhead channel is restored to normal operation, and the result of the fourth step is that the previously failed overhead channel is normal. When it is back up and running, the dynamics that manage the database and currently provide services 5) detecting the overhead channel and the dynamic overhead channel detected in the 5th step is not initialized, and only the state is changed to operate as the traffic channel, so that the call service of the terminal is normally performed. The sixth stage of maintenance is included.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The dynamic function according to the present invention is to change a traffic channel which is not used at present to an overhead channel when a normal operation cannot be performed due to a failure and an error in the overhead channel, and a call is made. This is a method for maintaining the call service state of the terminal normally by changing the channel in real time without any influence on the operating terminal.

According to the present invention, by using such a dynamic function, the call service to the terminal can be normally maintained even when the overhead channel operates abnormally.

In the present invention, the status information, channel type, and shape information for each channel are stored in a database so that each channel can be efficiently managed and maintained, and an unexpected error occurs. If the normal overhead channel and the traffic channel changed to the overhead channel, that is, the dynamic overhead channel are all in service or operate abnormally, periodically check the overhead channel Make it work properly.

That is, a temporary database (Data Base) for dividing and managing the overhead channel into a normal overhead channel and a dynamic overhead channel is generated, and when the overhead channel fails, temporary data is generated and the channel is generated. The type change is managed through two buffers so that the normal overhead channel and the dynamic overhead channel do not operate at the same time.

Further, in the present invention, the following operations are performed in order to perform the dynamic function more efficiently. That is, when a failure occurs in the overhead channel, the traffic channel is assigned to the dynamic overhead channel in the minimum time, and the traffic channel is changed to the dynamic overhead channel during the time when the existing service can be maintained.

In the event of overhead channel failure, the number of overhead channels per channel card is calculated, and the dynamic overhead channel is allocated to the channel card having the smallest overhead channel, so that one channel card is loaded more than traffic channels. Evenly allocated overhead channels.

When the failed overhead channel operates normally again, the traffic channel previously used as the overhead channel is changed to the original traffic channel so that the traffic channel can be efficiently used with a minimum channel change. To use.

The channel resource management method of the base station using the dynamic function in the mobile communication system according to the present invention will be described below with reference to FIG.

First, in the base station of the mobile communication system, after initialization, a database for channel management for each frequency or sector is generated and each status information and data are initialized (S1).

Next, the state of the overhead channel is periodically inspected (S2), it is determined whether or not a failure and an error have occurred in the overhead channel (S3), and if the overhead channel has a failure, the base station The station detects a failure occurrence of the overhead channel in real time through a hardware alarm and a software alarm (S).
4).

As described above, if a failure occurs in the overhead channel and normal operation is not performed, the base station manages the database and sets a traffic channel that is not currently used for a call (S5). , The set corresponding traffic channel is not initialized, and only the state is changed to promptly operate as the dynamic over channel (S6).

In this case, since the number of overhead channels is calculated for each channel card and the traffic channel of the channel card having the smallest overhead channel is changed to the dynamic overhead channel, the overhead channels are equally allocated to each channel.

Accordingly, the dynamic overhead channel operates normally and the call service of the terminal is maintained normally (S7).

As described above, when a failure occurs in the overhead channel, the base station detects the failure occurrence in real time, sets an unused traffic channel, and then initializes the set traffic channel. Instead, only the state of the channel is changed to the dynamic overhead channel so that it can be served as the dynamic overhead channel within a minimum of 3 seconds.

At this time, the traffic channel should be changed to the dynamic overhead channel in a minimum time within a time period in which the existing service can be maintained.

On the other hand, if no failure occurs in the overhead channel in the step (S3), it is determined whether the previously failed overhead channel is normally restored and is operating (S8).

That is, as a result of the determination in the step (S8), if the previously failed overhead channel is normally restored and is operating, the base station manages the database and performs the current service. The existing dynamic overhead channel is detected (S9), the detected dynamic overhead channel is not initialized, and only the state is changed to promptly operate as the traffic channel (S10).

Therefore, the traffic channel changed to the dynamic overhead channel in step S10 and the previous overhead channel operate normally, and the call service of the terminal is continuously maintained normally. (S11).

As described above, when the abnormal overhead channel becomes normal, the base station detects the dynamic overhead channel currently in service and does not initialize the dynamic overhead channel, and the channel state is changed. Only change to traffic channel so that it can serve as traffic channel within a minimum of 3 seconds.

On the other hand, according to the present invention, the abnormal operation of the overhead channel cannot be detected due to the abnormal operation of the base station, or the two overhead channels of the normal overhead channel and the dynamic overhead channel are detected. In order to prevent the simultaneous operation of the above, the base station periodically inspects the corresponding database and channel status, and if the abnormal operation of the overhead channel is not detected, the dynamic function is performed. If multiple overhead channels are operating at the same time, the dynamic overhead channel is changed to a traffic channel to provide the service.

When the operator does not desire the service for the sector or frequency, the base station activates / deactivates the service.
ion) and the overhead channel in question is abnormal, but the sector or frequency in question is deactivated, no dynamic function needs to be performed.

That is, the status of the overhead channel database is periodically checked so that even if the overhead channel operates abnormally due to an unexpected failure or error, normal operation can be performed again. If the operation of the overhead channels is not desired, each overhead channel is inspected to avoid performing the dynamic function.

In addition, according to the present invention, in the case of the sector base station, the positions of the dynamic overhead channels are set so that they are located in different sectors.
Even if an error occurs in the sector itself, the service to the terminal is maintained, and even if an error occurs in two of the three sectors, it can be located in the remaining one sector. To maintain the service status of the terminal.

[0042]

As described above, in the channel resource management method of the base station using the dynamic function in the mobile communication system according to the present invention, when the overchannel in the base station is normal, all traffic is If the channel is used as a call channel and the over channel is abnormal, change one of the unused traffic channels to a dynamic overhead channel to maintain the service status of the terminal and then When it becomes normal again, the channel resource is changed to a minimum by changing the former dynamic overhead channel to a traffic channel to maintain the service state of the terminal normally during the abnormal operation of the overhead channel. The effect of gaining There is.

Also, unlike the conventional duplexing method, since the Stenby overhead channel is not used, unnecessary channel consumption is eliminated, the performance load of the duplexing in real time is reduced, and the overhead channel is changed to the traffic channel. Or, when the traffic channel is changed to the overhead channel, the corresponding channel is not initialized and only the state is changed quickly, so that the call on the terminal is not interrupted and the call service can be maintained normally. There is.

[Brief description of drawings]

FIG. 1 is a flowchart showing a channel resource management method of a base station using a dynamic function in a mobile communication system according to the present invention.

FIG. 2 is a block diagram of a general mobile communication system.

[Explanation of symbols]

10 terminals 20 base stations 30 control station 40 exchanges

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Lee Guangroku, Seongguk secondary apartment 206-504 (56) Reference No. 8-274709 (JP, JP, JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04B ^7/ 24-7/26 H04Q ⁷ /00-7/38

Claims (8)

(57) [Claims] 1. After initialization of a base station of a mobile communication system, a database for channel management for each frequency or sector is generated, each status information and data are initialized, and then the status of an overhead channel is periodically measured. A first step of inspecting and determining whether or not a failure has occurred in the overhead channel; and, as a result of the determination in the first step, if a failure occurs in the overhead channel, after detecting a failure occurrence of the overhead channel in real time, A second step of managing a database to set a traffic channel that is not currently used for a call, and a dynamic overhead by changing only the state without initializing the corresponding traffic channel set in the second step. Operate on the channel to make the call service of the terminal normal. Third step and a channel resource management method of a base station using a dynamic function in a mobile communication system which is characterized in that encompass the lifting. 2. The database generated in the first step divides an overhead channel into a normal overhead channel and a dynamic overhead channel, and stores status information, channel type and shape information for each channel into a database, In case of overhead channel failure, the temporary overhead channel and the dynamic overhead channel can be serviced simultaneously or abnormally by generating temporary data and managing changes due to the channel type through two buffers. The channel of the base station using the dynamic function in the mobile communication system according to claim 1, wherein the overhead channel can be normally operated by detecting it when performing various operations. Source management method. 3. The method of calculating the number of overhead channels per each channel card when changing the traffic channel of the second stage, and changing the traffic channel of the channel card having the smallest overhead channel to a dynamic overhead channel. The method of claim 1, wherein an overhead channel is evenly allocated per channel card, and a base station channel resource management method using a dynamic function in a mobile communication system. 4. The traffic overhead channel is changed to a dynamic overhead channel in a minimum time within a time period in which the current service of the mobile station can be maintained when the dynamic overhead channel is changed in the third step. A channel resource management method for a base station, which uses a dynamic function in the mobile communication system as set forth in. 5. If the abnormal operation of the overhead channel cannot be detected by periodically checking the corresponding database and channel condition, the dynamic function is performed, and the normal overhead channel and the dynamic overhead channel are performed. When and operate at the same time, the dynamic overhead channel is changed to the traffic channel to perform the service, and the abnormal operation of the overhead channel cannot be detected due to the abnormal operation of the base station. Or preventing a phenomenon in which a normal overhead channel and a dynamic overhead channel operate at the same time.
A channel resource management method for a base station, which uses a dynamic function in the mobile communication system as set forth in. 6. If the operator does not want the service for the sector or frequency in question, the activation / deactivation of the service is checked from the base station to check whether the overhead channel is abnormal. The method of claim 1, wherein the dynamic function is not performed when the sector or the frequency is deactivated, and the channel resource management method of the base station using the dynamic function in the mobile communication system according to claim 1. 7. After the initialization of the base station of the mobile communication system, a database for channel management for each frequency or sector is generated, each status information and data are initialized, and then the status of the overhead channel is periodically measured. The first step of inspecting to determine whether the overhead channel has failed, and the result of the first step is that if the overhead channel has not failed, the previously failed overhead channel is normally detected. A second step of determining whether the overhead channel has recovered and is operating, and, as a result of the determination in the second step, that the previously failed overhead channel is normally recovered and operating,
A third step of managing a database to detect a dynamic overhead channel currently in service, and a dynamic overhead channel detected in the third step is not initialized, and only a state is changed to operate as a traffic channel. And a fourth step of maintaining the call service of the terminal normally, and a base station channel resource management method using a dynamic function in a mobile communication system. 8. After initialization of a base station of a mobile communication system, a database for channel management for each frequency or sector is generated, each status information and data are initialized, and then the status of the overhead channel is periodically measured. A first step of inspecting and determining whether or not a failure has occurred in the overhead channel; and, as a result of the determination in the first step, if a failure occurs in the overhead channel, after detecting a failure occurrence of the overhead channel in real time, A second step of managing a database to set a traffic channel that is not currently used for a call, and a dynamic overhead by changing only the state without initializing the corresponding traffic channel set in the second step. Operate on the channel to make the call service of the terminal normal. And a third step of determining whether the overhead channel that has previously failed is normally restored and operating when no failure has occurred in the overhead channel as a result of the determination in the first step. And, as a result of the determination in the fourth step, that the previously failed overhead channel is normally restored and is operating,
A fifth step of managing a database and detecting a dynamic overhead channel which is currently in service, and a dynamic overhead channel detected in the fifth step is not initialized, and only a state is changed to operate as a traffic channel. And a sixth step of maintaining the call service of the terminal normally, and a channel resource management method of a base station using a dynamic function in a mobile communication system.